Some of the best fighting and animation you'll see with some of the worst characters you'll see, and unfortunately hear

So, this is one of those animes that does some things really well, but does other things terribly. So to start off with the good. The art, the art is some of the best you'll see, everything looks super clean, especially in fights. There are some interesting characters like Inosuke, Tomioka, and Shinobu. And there are some pretty interesting fights such as when they enter into a demon's house, and realise he can control it like a rubix cube.

So, the bad, and my god there's a lot of it. Characters, many of them are completely stuck into their gimmick in every scene. Yes, many characters get a gimmick, and it's their only feature it seems. Zenitsu's is that he's the screaming coward, so in almost every single scene, he's screaming about ANYTHING and EVERYTHING. It really made me hate him the more he was on the screen, just bloody yelling non-stop. Then in the last few episodes we meet a guy with an empathy/crying gimmick, so guess what? He's crying every time he has lines. We meet another guy who constantly says "flamboyantly" so, he just says it, all the time, out of context or not, just every sentence he fits in, "flamboyantly". We have another guy whose gimmick is to be not paying attention, this guy feels like a rip-off on the comedy of Gintama when characters don't pay attention during dialogue, but they've done it pretty badly and none of it's funny. We have some girl who constantly thinks everything is cute/cool, so during dialogue they constantly cut to her just so she can think to herself "they look so cute/cool!", it adds nothing at all.

Another big issue with KnY is the way they portray characters, as well as the gimmicks. The main character has his whole family slaughtered in the first episode, but it seems like he's a sociopath, because he acts shocked for about all of 20 seconds before returning to his normal self. It's such a cheap way to build a character, to kill off almost their entire family, and have it mean almost nothing to the character beyond him intermittently saying "the bad guys killed my family!" when they want to remind the audience of why you should care about him. The second main character who's the only other person that's in every episode, Nezuko, is essentially a dog. She has no dialogue, which makes no sense as other demons can speak? (Also don't understand why she has to wear a muzzle) She randomly fights sometimes but then is written to be sleeping every other time (not weak storytelling at all), and people talk about her like she's a pet most of the time.

As a small note, they need to stop with the cliche of "we're going to have a conversation in the middle of a fight, and the enemy will move at 1 tenth of their usual speed until we finish talking, or better yet, they won't move at all and just stare at us talking the entire time".

This is one of those anime, that I genuinely don't understand how it's so popular. I think there's a lot of potential for it to get pretty good next season/movie, but they have got to let up on spamming these gimmicked characters who offer nothing beyond their catchphrase/signature. Also, as a side-note, they need to work on the comedy, because it's really not funny at all, and sometimes they try to make jokes in what they want you to believe is a serious situation.

Oh, and I forgot another thing they love to do. Every time the bad guy is killed they give them flashbacks of someone being mean to them, that is stupid as shit. Why should we feel bad for someone who has eaten humans, just because someone said that their writing sucked, and that they're a loser?